Ishnazarov 1972. [New data on Devonian brachiopods from the Chatkal River Basin (Tyan Shan).] Masumov, A.S.; Abdullaev, R.N.[Eds]. [New reports on the Palaeozoic and Mesozoic fauna of Uzbekistan.], Fan, Tashkent, 1972: 46-52. Chapter pagination: 68-74